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statistics

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If the standard deviation for waiting times in a line is 5 minutes, the standard deviation for the averages of 30 randomly chosen waiting times is _____ minutes.

  • statistics -

    SEm = standard error(deviation) of the mean

    SEm = SD/√n

  • statistics -

    0.9

  • statistics -

    .9

  • statistics -

    0.9

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